It doesn’t appear that this plinth bears much relation to the old Obsidian one. Can’t really comment on the arm. it looks like what they fitted to the GAE version of the new 1200 model which was supposedly ok. Their promo pic showed the deck with 3 arms installed the other 2 being the 9" and 12" Ortofon models.

That is a nice looking deck, but £15K will buy you an awful lot of TW Akustic, Transrotor, Dr Feikert, Brinkmann, STST, Bergmann, Systemdek, Linn, Roksan etc etc etc. You might even get some wonk into your life for that kind of ££.

I think my money would go elsewhere TBH, but that is a matter of personal choice.